Electrical Testing – Proving & Verification

Explore our range of proving and verification equipment designed to confirm the correct operation of electrical test instruments. These tools are essential for checking that voltage indicators and testers are functioning correctly before and after use, helping ensure safe and accurate testing.

Our selection includes proving units and calibration checkboxes, providing reliable solutions for verifying test equipment performance and confirming readings. Suitable for a range of applications, these tools support routine testing procedures and help maintain confidence in your equipment.

Designed for dependable performance, these tools provide a straightforward and effective way to confirm functionality, support compliance with testing procedures and ensure consistent electrical testing results.

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- Proving Units
- Fluke PRV240 Proving Unit with Magnetic Hanger
- Original price was: £181.00.Current price is: £140.00. / £168.00 incl VAT
- ⚡ Portable, pocket-sized, battery-powered proving unit ⚡ Includes Magnetic Hanging Strap ⚡ Long battery life - Approx. 5,000 tests per set of four AA batteries ⚡ The PRV240 reduces the risk of shock and arc flash. ⚡ One Year Fluke Warranty.
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- Proving Units
- Fluke PRV240FS Field Sense Proving Unit with Magnetic Hanger
- Original price was: £160.00.Current price is: £130.00. / £156.00 incl VAT
- ⚡Prove operation of FieldSense function on T6 electrical testers ⚡Reduce risk of shock and arc flash by validating tool operation ⚡Source both AC and DC steady-state voltage (240 V AC/DC) ⚡1 Year Fluke Warranty
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- Calibration Checkboxes
- Kewtech Kewcheck FC2000 Calibration Check Box
- £152.00 / £182.40 incl VAT
- ⚡ 12 comprehensive test points ⚡ Insulation, continuity, RCD and loop test function ⚡ Comes in a protective hard case ⚡ Checks all leading makes of 18th Edition testers ⚡ Null facility for test leads
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- Proving Units
- Kewtech Kewprove 3 Proving Unit
- £65.00 / £78.00 incl VAT
- 1 Year Kewtech warranty Outputs 690v AC/DC Two sockets for two probes Perfect for use with any make of voltage tester ⚡ Magnet within base allows for mounting upon metal surfaces
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- Proving Units
- Kewtech KTP1 Proving Unit
- Original price was: £64.00.Current price is: £52.00. / £62.40 incl VAT
- ⚡ Press a button to perform the required test. ⚡ Suitable for use on-site and off-site. ⚡ Simple one-button functionality. ⚡ Clip on to your belt or carry case.
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- Proving Units
- Martindale PD240 – 240V Proving Unit
- £70.00 / £84.00 incl VAT
- ⚡ Compact and portable, fits easily in a pocket or tool bag ⚡ Provides a 240V DC output to check voltage testers and multimeters ⚡ Safe operation with a 2mA output, compatible with most digital testers ⚡ Battery-powered for portability, no external power source required ⚡ Includes belt clip for hands-free use during testing
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- Proving Units
- Martindale PD440S 440V AC Proving Unit
- £87.00 / £104.40 incl VAT
- ⚡ Safely and simply proves the operation of voltage indicators and test lamps up to 440V ⚡ Essential for implementing effective safe isolation procedures ⚡ Tough over-molded low profile design ⚡ Long battery life with low battery indicator ⚡ Includes MAG3 high strength magnetic hanger ⚡ Colour coded for voltage output
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- Proving Units
- Martindale PD440S-C 440V AC Proving Unit and TC71 Soft Carry Case | 440V
- £110.00 / £132.00 incl VAT
- ⚡ 440V AC output for fast voltage verification ⚡Soft carry case allows in-case operation and protects from damage ⚡Compatible with Martindale VI-13800 & VI-15000 indicators ⚡ Ideal for industrial and commercial safety testing up to 440V ⚡ Martindale 2 year warranty
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- Proving Units
- Martindale PD440SX 50V/120V/230V/440V AC Proving Unit with CALCHECK
- £120.00 / £144.00 incl VAT
- ⚡ Safely proves the operation of voltage indicators and test lamps up to 440V ⚡ Unique CAL CHECK function for multifunction installation tests ⚡ Individual LED indicators matched to voltage indicator thresholds ⚡ Long battery life with low battery indicator ⚡ Includes MAG3 high strength magnetic hanger ⚡ Colour coded for voltage output
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- Proving Units
- Martindale PD690S 690V AC Proving Unit
- £104.00 / £124.80 incl VAT
- ⚡ Safely and simply proves the operation of voltage indicators and test lamps up to 690V ⚡ Essential for implementing effective safe isolation procedures ⚡ Tough over-molded low profile design ⚡ Long battery life with low battery indicator ⚡ Includes MAG3 high strength magnetic hanger
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- Proving Units
- Martindale PD690S-C Slimline Proving Device with TC71 Soft Carry Case | 700V
- £130.00 / £156.00 incl VAT
- ⚡Proving Unit safely and simply proves the operation of voltage indicators and test lamps up to 690V ⚡Integrates with your existing Voltage Indicator in a single kit ⚡Essential for implementing effective safe isolation procedures ⚡Robust construction provides long life and ensure safety
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- Proving Units
- Martindale PD690SRD 690V AC/DC Proving Unit with 5 Ranges
- £123.00 / £147.60 incl VAT
- ⚡ Suitable for use with voltage indicators up to 690V ⚡ Switchable AC / DC output mode via push button ⚡ Stepped voltage output matched to two-pole tester thresholds ⚡ Compatible with S-series magnetic hanger ⚡ Ideal for proving indicators and measurement devices up to 690V AC or DC in domestic and commercial applications
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- Proving Units
- Martindale PD690SX 50V/120V/230V/400V/690V AC Proving Unit with CALCHECK
- £117.00 / £140.40 incl VAT
- ⚡ CALCHECK function enables pre-certification verification of tester calibration on-site ⚡ Stepped voltage outputs from 50V to 690V with LED indicators for each level ⚡ Instant 690V output for full voltage verification at test start ⚡ Built-in continuity test using low resistance simulation at test en ⚡ Reference resistance pads to detect calibration drift in insulation and continuity testers
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- Proving Units
- Martindale VIPD138-S Voltage Indicator & Proving Unit Kit
- £177.00 / £212.40 incl VAT
- ⚡ Industry-standard voltage indicator ⚡ Same as VI13700 but with no fuse ⚡ Fully GS38 compliant ⚡ Heavy-duty double insulated leads ⚡ Bright LEDs
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- Proving Units
- Megger MPU690 Proving Unit
- £81.00 / £97.20 incl VAT
- 5 stepped nominal output voltages Automatic operation High output power suitable for test lamps Extended battery life Magnetic base Rugged case
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- Calibration Checkboxes
- Metrel CS2099 EuroCheck Calibration Checkbox
- £457.29 / £548.75 incl VAT
- ⚡ Insulation resistance calibration with up to 1000 V test voltage ⚡ Calibration for low resistance, continuity, fault loop impedance, and RCD functions ⚡ Calibration and verification of RCD trip-out time, line impedance, voltage, and frequency ⚡ Compliance with IEC/EN 61326 for electromagnetic compatibility and IEC/EN 61010-1 for safety ⚡ Includes Eurocheck instrument, carrying bag, and instruction manual
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- Calibration Checkboxes
- MTB7671/2 Megger Calibration Check Test Box
- £394.00 / £472.80 incl VAT
- ⚡ Tests the full range of a testers capability ⚡ Does not trip RCD protected circuits ⚡ Tests to the regulations BS7671, BS EN 61557, and IEE On-Site Guide ⚡ Checks insulation, continuity, loop, PFC, RCD, and voltage measurement functions ⚡ Confirms testers continued performance between calibrations
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- Calibration Checkboxes
- NICEIC CalCard Calibration Checkbox | Calibration Check Card
- Original price was: £23.00.Current price is: £16.00. / £19.20 incl VAT
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- Calibration Checkboxes
- Seaward Apollo Series PAT Tester Checkbox (FOR SEAWARD APOLLO ONLY)
- £61.00 / £73.20 incl VAT
- ⚡ Checks performance of Seaward PAT testers in between calibrations ⚡ Compatible with Apollo 400, 500, 600+ ONLY! ⚡ Ensures that the PAT testers can successfully detect a fail result
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- Proving Units
- Seaward PP1 Proving Unit
- £151.00 / £181.20 incl VAT
- ⚡ Output Voltage: 240V DC nominal for accurate and reliable testing. ⚡ Neon indicator clearly signals when the output voltage is active. ⚡ Compact size (100mm x 75mm x 40mm) for portability and ease of use. ⚡ Battery-powered, eliminating the need for external power sources. ⚡ Compatible with Seaward voltage indicators and voltmeters for seamless functionality.
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- Calibration Checkboxes
- Seaward Primetest PAT Tester Checkbox
- £61.00 / £73.20 incl VAT
- ⚡ Checks performance of Seaward PAT testers in between calibrations ⚡ Compatible with Primetest 50, Primetest 100 and Primetest 250+ ONLY! ⚡ Ensures that the PAT testers can successfully detect a fail result
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- Proving Units
- Seaward Proving Unit MkII for use with the Seaward Live Line Tester (423A911)
- £292.50 / £351.00 incl VAT
- ⚡ Reliable Performance Verification: Ensures your LLT Mk2 is operating correctly with a clear, active indicator. ⚡ Network Rail Certified: Complements the certified LLT Mk2 for complete compliance and safety. ⚡ Portable and User-Friendly: Battery-powered and designed for field use with easy-to-follow instructions.
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- Calibration Checkboxes
- Socket & See CB400 Non-Trip Installation Testing Calibration Checkbox
- £273.00 / £327.60 incl VAT
- ⚡ Non-trip RCD testing method ⚡ Reduces expensive calibration costs ⚡ Continually validate your instruments through regular self-calibration checks ⚡ Null facility to remove lead resistance ⚡ 2 Year Socket & See Warranty
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- Calibration Checkboxes
- Socket & See IRC CHECK Insulation & Continuity Resistance Calibration Check Box
- £49.00 / £58.80 incl VAT
- ⚡ Validates Continuity readings up to 2Ω ⚡ Validates Insulation readings up to 200MΩ ⚡ For use with any standard insulation, continuity, or multifunction tester ⚡ Universal 4mm lead terminals allows the unit to be used with almost any standard insulation and continuity tester, as well as multifunction testers. ⚡ For testers that have a null feature, the user can…
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